Nonlinear dynamics of two-color optical vortices in lithium niobate crystals.
Nonlinear dynamics of two-color optical vortices in lithium niobate crystals.
复制标题
铌酸锂晶体中双色光学涡旋的非线性动力学。
DOI：
10.1364/oe.16.005406
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发表时间：
2008
期刊：
影响因子：
3.8
通讯作者：
Y. Kivshar
中科院分区：
文献类型：
--
作者：
A. Dreischuh;D. Neshev;V. Kolev;S. Saltiel;M. Samoć;W. Krolikowski;Y. Kivshar
我们在实验上研究了双色涡旋光束在二次谐波产生的情况下的非线性动力学，结合光折射和热折射的影响，以及自相位调制和诱导相位调制。我们使用掺铁的LiNbO_3晶体作为涡旋传播的非线性介质，并通过实验观察到，根据激光波长，双电荷涡旋的衰减，背景光束的分裂和整形，图案的形成，以及涡旋对的可控非线性旋转。
We study experimentally the nonlinear dynamics of two-color optical vortex beams in the presence of second-harmonic generation combined with the effects of photo- and thermal refraction, as well as self- and induced-phase modulation. We use an iron-doped lithium niobate crystal as a nonlinear medium for the vortex propagation and observe experimentally, depending on the laser wavelength, a decay of a double-charge vortex, splitting and reshaping of background beam, pattern formation, and controllable nonlinear rotation of a vortex pair.